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Help with 1986 Evinrude BE40ELCDE engine - rough idle

ma_ko

New member
First of all sorry for my english, I'm from Poland & still learning.

I have cleaned carburetors, installed new plugs, checked pressure: 10.5 bar on each cylinder - looks like the ignition is getting disrupted(?). I hooked up a strobe light timing at idle (~800RPM) is 4 degrees, anyone know how much it should be? It reaches around 19 degrees on max RPM. But the strobe light is kind of erratic, it's not stable so I don't know how faithful it is. Does anyone have any idea what to check next?

I am attaching a video: https://files.catbox.moe/6k5rly.mp4
 
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